skid for moving on snow, ice and water, such as a ski or a snowboard

ABSTRACT

A skid for moving on snow, ice and water, such as a ski or a snowboard, consisting of a sliding surface ( 1 ) which touches the surface of snow, ice or water directly, and its opposite, top surface ( 4 ), characterized by the fact that its sliding surface ( 1 ) and its parallel surface ( 4 ) have a shape of a wave ( 3 ) with a frequency of more than 2.5 waves per its effective length, along its long axis ( 2 ).

The subject of the invention is a skid for moving on snow, ice and water, such as a ski or a snowboard.

American patent no. U.S. 2001/0052679 describes a snowboard with a sliding surface, and its opposite top surface, having a shape of a wave with a frequency of two waves per length of the board along the long axis, where two wave peaks are facing upwards, with boot bindings located on top of each of these peaks.

American patent application U.S. 2006/0091645 describes a snowboard where both opposite side surfaces running along the snowboard's side edges are corrugated with a higher number of waves.

A skid for moving on snow, ice and water, such as a ski or a snowboard, according to the invention, consists of a sliding surface which touches the surface of snow, ice or water directly, and its opposite, top surface, characterized by the fact that its sliding surface, and its top surface have a shape of a wave in the form of an entire length of a sinusoid or a similar undulating curve having a maximum and minimum with a frequency of more than 2.5 waves per the effective length of the skid, such effective length meaning the span between extreme points contacting the underlying surface disregarding the arched sections of nose tips and rear terminal sections along its long axis.

The solution used in the invention, of conferring a parallel wavy shape to the bottom sliding surface and the top surface of the ski or snowboard, makes the skid more torsion resistant without increasing its lengthwise stiffness. By making the skid wavy, the skid attains a high lengthwise elasticity being at the same time more torsion resistant. It also increases the edges ability to hold on to hard snow and ice.

The subject matter of the invention is exemplified in the embodiments shown in the drawing, where the individual figures present:

FIG. 1 shows a ski with a view of the sliding surface,

FIG. 2—a ski with a wavy sliding surface and a parallel top surface, seen from the side,

FIG. 3—a snowboard with a view of the sliding surface,

FIG. 4—a snowboard with a wavy sliding surface and a wavy top surface, seen from the side.

As shown in FIG. 2 and FIG. 4, the sliding surface as well as the parallel top surface 4 of the ski and snowboard have a shape of a wave 3, with a frequency of more than 2.5 per the effective length of the ski or snowboard along the long axis 2, meaning that each of these opposite surfaces, the sliding surface 1 and top surface 4 of the ski and the snowboard, undulate more than 2.5 times along the total effective length with waves 3. 

1. A skid for moving on snow, ice and water, such as a ski or a snowboard, according to the invention, consists of a sliding surface which touches the surface of snow, ice or water directly, and its opposite, top surface, whereby its effective length is the section between extreme points contacting the underlying surface, disregarding the arched sections of nose tips and ski or snowboard foot, with the waving having the shape of an entire full length of a sinusoid or a similar variable curve with wave maximum and minimum, characterized by the fact that its sliding surface (1) and its parallel top surface (4), opposite to the sliding surface (1), have a shape of a wave (3) with a frequency of more than 2.5 waves per the effective length of the skid along its long axis (2). 